Experiments are_______________?
Correct answer: B. based on controlling a variable and observing the results
- A. the most common method of social investigation
- B. based on controlling a variable and observing the results
- C. not used in the study of humans
- D. valid only if performed on white mice
Explanation
An experiment deliberately controls or changes one variable and observes its effect, often while holding other conditions constant. Experiments can be used with human participants under suitable ethical rules.
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Individual consumers, firms and markets are examined through demand and supply, elasticity, consumer choice, production, costs, revenue and the determination of prices and output. The topic also covers market structures such as perfect competition, monopoly and oligopoly, plus market failure, externalities and the distinction between microeconomic decisions and economy-wide outcomes.
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